Help I think I am being hacked

Hello I think my mac is being hacked at my workplace. I connect wirelessly to the internet at my job. i am using 10.5.8 and in the finder side panel I see the name of computers from other people at my job under the word shared. I have included a screen shot of what I am talking about:

What does this mean, do these other computers have access to my computer? Am I being hacked?

You're not being hacked. Those are computers which are on the same network as you and possibly have sharing turned on. Is your wireless network protected by encryption? In other words, do you need to sign on with a password or certificate?

In any event, they can't gain access to your machine unless you allow it. Do this:

Open System Preferences, click on Sharing. Make sure you're not sharing your machine on the office network. Look to see if any of those options are checked off. If they are, remove the checks and reboot.

dtravis7 I just was trying point out from the information in the screen shoot it would be very easy to make a fake email with an excel file in that contains some backdoor send it to them saying it a quote for work they open it and the person could have full access to his/her machine and looking on the screen shot one computer looks like finance one.

Oh..and if you WERE being hacked..a good hacker would certainly not do it in a visible form that you'd be able to see..you logged into your work network most likely and are seeing other PC's on the network..

Also, just to reassure the OP further -- not only is there nothing untoward going on, what you are seeing is in fact PERFECTLY NORMAL when there are other computers (particularly PCs) on the same network. You're just seeing what the other machines are, not necessarily (unless they have sharing turned on) anything on those machines. And again unless you have VERY deliberately opted to share the contents of your machine, they conversely CANNOT get into your machine either (other than a pre-set, empty, "Public Dropbox" folder, that is).